EP 0720370 A2 19960703 - Compensation for truncation error in a digital video signal decoder
Title (en)
Compensation for truncation error in a digital video signal decoder
Title (de)
Approximationsfehlerkompensation in einem Dekodierer für digitales Videosignals
Title (fr)
Compensation d'une erreur de tronquage dans un décodeur de signal vidéo numérique
Publication
Application
Priority
US 36572194 A 19941228
Abstract (en)
The apparatus includes a device which produces a DC offset compensation value as a function of accumulated DC offset truncation errors. The compensation value is stored in a first memory (40) in response to a system configuration control signal. A second memory (60) stores a number of compensation values which are provided to the first memory in response to the control signal. The error is a function of the number of truncation stages and of the scale factor by which data at each truncation stage is multiplied relative to the nominal, non-scaled data. The value of the error is measured to produce an output measured value. The measuring device also provides the compensation value a an output with a value approximately equal to the negative of the measured value. The compensation value is added to the signal path to reduce the value of the error.
IPC 1-7
IPC 8 full level
H04N 5/21 (2006.01); H04N 5/44 (2006.01); H04N 5/455 (2006.01); H04N 5/16 (2006.01)
CPC (source: EP KR US)
H04N 5/211 (2013.01 - EP US); H04N 5/455 (2013.01 - KR); H04N 21/426 (2013.01 - EP US); H04N 21/60 (2013.01 - KR); H04N 5/16 (2013.01 - EP US)
Designated contracting state (EPC)
DE GB
DOCDB simple family (publication)
US 5493343 A 19960220; CN 1115042 C 20030716; CN 1135145 A 19961106; DE 69526194 D1 20020508; DE 69526194 T2 20020829; EP 0720370 A2 19960703; EP 0720370 A3 19981111; EP 0720370 B1 20020403; JP 3964473 B2 20070822; JP H08242415 A 19960917; KR 100382434 B1 20030718; KR 960028571 A 19960722; MY 115192 A 20030430; SG 41964 A1 19970815
DOCDB simple family (application)
US 36572194 A 19941228; CN 95120456 A 19951227; DE 69526194 T 19951222; EP 95120376 A 19951222; JP 34414395 A 19951228; KR 19950061424 A 19951228; MY PI9504110 A 19951227; SG 1995002287 A 19951222